-er -ic a-a a-c a-i a-t aaa aac aad aae aag aai aar aas aat ac- aca acc acd ace acg aci acr acs act ad- ada adc add ade adg adi adr ads adt aea aec aed aee aeg aei aer aes aet ag- aga agc agd age agg agi agr ags agt ai- aia aic aid aie aig aii air ais ait ar- ara arc ard are arg ari arr ars art as- asa asc asd ase asg asi asr ass ast at- ata atc atd ate atg ati atr ats att c-- caa cac cad cae cag cai car cas cat cca ccc ccd cce ccg cci ccr ccs cct cda cdc cdd cde cdg cdi cdr cds cdt ce- cea cec ced cee ceg cei cer ces cet cga cgc cgd cge cgg cgi cgr cgs cgt ci- cia cic cid cie cig cii cir cis cit cra crc crd cre crg cri crr crs crt csa csc csd cse csg csi csr css cst cta ctc ctd cte ctg cti ctr cts ctt daa dac dad dae dag dai dar das dat dca dcc dcd dce dcg dci dcr dcs dct dda ddc ddd dde ddg ddi ddr dds ddt de- dea dec ded dee deg dei der des det dga dgc dgd dge dgg dgi dgr dgs dgt di- dia dic did die dig dii dir dis dit dra drc drd dre drg dri drr drs drt dsa dsc dsd dse dsg dsi dsr dss dst dta dtc dtd dte dtg dti dtr dts dtt eaa eac ead eae eag eai ear eas eat ec- eca ecc ecd ece ecg eci ecr ecs ect ed- eda edc edd ede edg edi edr eds edt eea eec eed eee eeg eer ees eet ega egc egd ege egg egi egr egs egt eia eic eid eie eig eii eir eis eit era erc erd ere erg eri err ers ert es- esa esc esd ese esg esi esr ess est eta etc etd ete etg eti etr ets ett g-d gaa gac gad gae gag gai gar gas gat gca gcc gcd gce gcg gci gcr gcs gct gda gdc gdd gde gdi gdr gds gdt ge- gea gec ged gee geg gei ger ges get gga ggc ggd ggg ggi ggr ggs ggt gia gic gid gie gig gii gir gis git gra grc grd gre grg gri grr grs grt gsa gsc gsd gse gsg gsi gsr gss gst gta gtc gtd gte gtg gti gtr gts gtt i-d ia- iaa iac iad iae iag iai iar ias iat ica icc icd ice icg ici icr ics ict ida idc idd ide idg idi idr ids idt ie- iea iec ied iee ieg iei ier ies iet iga igc igd ige igg igi igr igs igt iia iic iid iie iii iir iis iit ir- ira irc ird ire irg iri irr irs irt is- isa isc isd ise isg isi isr iss ist ita itc itd ite itg iti its itt ra- raa rac rad rae rag rai rar ras rat rca rcc rcd rce rcg rci rcr rcs rct rda rdc rdd rde rdg rdi rdr rds rdt re- rea rec red ree reg rei rer res ret rga rgc rgd rge rgg rgi rgr rgs rgt ria ric rid rie rig rii rir ris rit rra rrc rrd rrg rri rrr rrs rrt rsa rsc rsd rse rsg rsi rsr rss rst rta rtc rtd rte rtg rti rtr rts rtt saa sac sad sae sag sai sar sas sat sca scc scd sce scg sci scr scs sct sda sdc sdd sde sdg sdi sdr sds sdt se- sea sec sed see seg sei ser ses set sga sgc sgd sge sgg sgi sgr sgs sgt sia sic sid sie sig sii sir sis sit sr- sra src srd sre srg sri srr srs srt ss- ssa ssc ssd sse ssg ssi ssr sss sst sta stc std ste stg sti str sts stt taa tac tad tae tag tai tar tas tat tca tcc tcd tce tcg tci tcr tcs tct tda tdc tdd tde tdg tdi tdr tds tdt te- tea tec ted tee teg tei ter tes tet tga tgc tge tgg tgi tgr tgs tgt tia tic tid tie tig tii tir tis tit tra trc trd tre trg tri trr trs trt tsa tsc tsd tse tsg tsi tsr tss tst tta ttc ttd tte ttg tti ttr tts ttt